Material bubble elimination: the role of vacuum planetary mixers in battery slurry and cosmetics

The vacuum planetary mixer can efficiently eliminate micrometer sized bubbles in high viscosity materials through the synergistic effect of "planetary stirring+vacuum defoaming". The bubble content can be controlled below 0.1% in lithium battery slurry, significantly improving electrode uniformity and battery cycle life; In the production of cosmetics, it effectively improves the delicacy and stability of the paste, reduces the application of bubbles and holes, and enhances the skin feel experience.

1、 Core working principle: 3D mixing+vacuum defoaming

The vacuum planetary mixer (also known as the planetary vacuum defoaming mixer) adopts a unique "revolution+rotation" composite motion structure to achieve efficient defoaming in a closed vacuum environment:

Planetary mixing: The mixing blade revolves around the center of the container while also rotating on its own, forming a non repeating motion trajectory to ensure that the material rolls and mixes in all directions, avoiding dead corners.

Vacuum environment defoaming: The chamber is pumped to below -0.098 MPa, and the bubbles expand 3-5 times in volume under low pressure, quickly rising and bursting.

Scraping design: The stirring blade is tightly attached to the barrel wall (with a gap of 0.5-2 mm), continuously scraping off the attached material to prevent local solidification or component segregation.

✅  This triple mechanism of "centrifugal force+vacuum negative pressure+shear force" is particularly suitable for mixing and defoaming high viscosity, thixotropic sensitive materials such as lithium battery slurry, silicone, epoxy resin, etc.

2、 Typical application scenarios and industry adaptation

1. New energy battery materials

Used for mixing and homogenization of positive and negative electrode slurries (such as NCM811, LFP);

Ensure that the conductive agent, binder, and active substance are fully dispersed and maintain good flowability even when the solid content reaches 70%;

Combined with vacuum defoaming, reducing electrode porosity and improving battery cycle life.

2. Production of adhesives and sealants

Processing high viscosity materials such as epoxy resin, polyurethane, silicone adhesive, etc. (up to 1000000 cP);

Efficient dispersing fillers (such as calcium carbonate and gas-phase silica) to avoid agglomeration;

The viscosity consistency of the finished product is high, and the coating performance is stable.

3. Cosmetics and daily chemical products

Prepare face cream, lotion, lipstick base and other paste products;

Synchronize defoaming during the mixing process to avoid a "honeycomb" structure and enhance skin feel and appearance quality;

Meets hygiene standards, easy to clean, and prevents cross contamination.

4. Pharmaceutical and Food Industry

Used for homogenizing and mixing ointment, gel, jam, chocolate paste and other products;

Support sterile operating environment, meet GMP and HACCP requirements;

Clean validation is convenient and suitable for switching production between multiple batches.

The advantages of vacuum planetary mixer are reflected

Synchronize defoaming during the mixing process to avoid the "honeycomb" structure caused by residual bubbles;

Improved delicacy of the finished product, with user feedback stating "faster absorption and better skin feel";

The core of the dual planetary power hybrid lies in its unique dual motion system:

Low speed planetary stirring: the stirring paddle (such as Fried Dough Twists frame) rotates around the central axis of the container while rotating itself, rolling up and down with animal materials to form three-dimensional flow, avoiding stratification and accumulation.

High speed dispersing shaft: The dispersing disk located on the planetary carrier revolves synchronously and rotates at high speed (up to 2000 rpm), applying strong shear force to the material and quickly dispersing clustered particles.

Vacuum defoaming ability: Most models are equipped with a vacuum system (up to -0.098 MPa), which effectively removes bubbles involved in the mixing process in a closed environment, improving product density and stability.